摘要
采用环形缝隙和阻尼孔并联结构的液压缓冲器,利用液体的可压缩性和活塞腔流体出流面积迅速缩小,使活塞腔压力瞬间升高,对被测试件实施冲击。建立该缓冲器的数学模型,对其冲击波形进行仿真。结果表明,环形缝隙和并联阻尼孔面积是影响冲击波形的关键因素,减小环形缝隙或并联阻尼孔面积,冲击时间缩短,冲击加速度峰值增大,调节并联阻尼孔面积,可以调节冲击波形。该缓冲器可用于跌落式冲击试验机或双波冲击试验机中,对被测试件实施较为严酷的冲击。
The hydraulic damper proposed can be used in the shock test machine to generate much more violent shock wave. It has two kinds of parallel passages, one is the annular gap, and the other is the orifice. Mathematical model is established to calculate the shock wave characteristics. The results show that the hydraulic damper can absorb large energy within short time. The shock wave characteristics are mainly affected by sectional area of the annular gap and orifice. Shorter shock time, higher acceleration peak, and smaller shock displacement can be obtained with the smaller sectional area. So the shock wave characteristics can be adjusted by changing the sectional area of the orifice.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第9期27-29,39,共4页
Journal of Vibration and Shock
基金
中国人民解放军总装备部舰载设备冲击试验系统
关键词
液压缓冲器
冲击波形
hydraulic damper
shock wave characteristics
